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| 4 | daniel-mar | 1 | <?php /* <ViaThinkSoftSignature> |
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| 51 | daniel-mar | 23 | Q== |
| 4 | daniel-mar | 24 | </ViaThinkSoftSignature> */ ?> |
| 2 | daniel-mar | 25 | <?php |
| 26 | |||
| 27 | /* |
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| 28 | * VNag - Nagios Framework for PHP |
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| 29 | * Developed by Daniel Marschall, ViaThinkSoft <www.viathinksoft.com> |
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| 30 | * Licensed under the terms of the Apache 2.0 license |
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| 31 | * |
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| 51 | daniel-mar | 32 | * Revision 2022-05-19 |
| 2 | daniel-mar | 33 | */ |
| 34 | |||
| 35 | declare(ticks=1); |
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| 36 | |||
| 37 | define('OUTPUT_UOM', 'GB'); |
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| 38 | define('ROUND_TO', 0); |
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| 39 | |||
| 40 | class VirtualMemCheck extends VNag { |
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| 41 | public function __construct() { |
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| 42 | parent::__construct(); |
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| 43 | |||
| 44 | $this->registerExpectedStandardArguments('Vhtwc'); |
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| 45 | |||
| 46 | $this->getHelpManager()->setPluginName('check_virtual_mem'); |
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| 47 | $this->getHelpManager()->setVersion('1.0'); |
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| 48 | $this->getHelpManager()->setShortDescription('This plugin checks the amount of free virtual memory (real memory + swap combined).'); |
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| 49 | $this->getHelpManager()->setCopyright('Copyright (C) 2011-$CURYEAR$ Daniel Marschall, ViaThinkSoft.'); |
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| 50 | $this->getHelpManager()->setSyntax('$SCRIPTNAME$ [-w freeMemKB|%] [-c freeMemKB|%]'); |
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| 51 | $this->getHelpManager()->setFootNotes('If you encounter bugs, please contact ViaThinkSoft at www.viathinksoft.com'); |
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| 52 | |||
| 52 | daniel-mar | 53 | // In this context, when the user writes "-w 10GB" then they probably mean "-w @10GB". Make sure that the user doesn't do it wrong |
| 2 | daniel-mar | 54 | $this->warningSingleValueRangeBehaviors[0] = self::SINGLEVALUE_RANGE_VAL_LT_X_BAD; |
| 55 | $this->criticalSingleValueRangeBehaviors[0] = self::SINGLEVALUE_RANGE_VAL_LT_X_BAD; |
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| 56 | } |
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| 57 | |||
| 58 | protected function cbRun($optional_args=array()) { |
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| 51 | daniel-mar | 59 | if (!file_exists($meminfo_file = '/proc/meminfo')) { |
| 60 | throw new VNagException("Cannot find $meminfo_file"); |
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| 2 | daniel-mar | 61 | } |
| 62 | |||
| 51 | daniel-mar | 63 | $meminfo_attrs = array(); |
| 64 | foreach (file($meminfo_file) as $line) { |
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| 65 | $line = trim($line); |
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| 66 | if ($line == '') continue; |
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| 67 | list($key, $value) = explode(':', $line, 2); |
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| 68 | if ((!strstr($key,'Pages')) && (strtolower(substr($line,-2)) !== 'kb')) { |
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| 69 | throw new Exception("meminfo shall contain Kilobytes!"); |
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| 70 | } |
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| 71 | $meminfo_attrs[$key] = (int)trim(substr($value, 0, strlen($value)-2)); |
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| 72 | } |
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| 73 | |||
| 74 | if (!isset($meminfo_attrs['MemAvailable'])) { |
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| 75 | $meminfo_attrs['MemAvailable'] = $meminfo_attrs['MemFree']; |
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| 76 | if (isset($meminfo_attrs['Buffers'])) $meminfo_attrs['MemAvailable'] += $meminfo_attrs['Buffers']; |
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| 77 | if (isset($meminfo_attrs['Cached'])) $meminfo_attrs['MemAvailable'] += $meminfo_attrs['Cached']; |
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| 78 | } |
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| 79 | |||
| 80 | $totalKB = $meminfo_attrs['MemTotal'] + $meminfo_attrs['SwapTotal']; |
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| 81 | $freeKB = $meminfo_attrs['MemAvailable'] + $meminfo_attrs['SwapFree']; |
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| 2 | daniel-mar | 82 | $freePercent = $freeKB/$totalKB*100; |
| 83 | |||
| 84 | $this->checkAgainstWarningRange( array($freeKB.'KB', $freePercent.'%'), false, true, 0); |
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| 85 | $this->checkAgainstCriticalRange(array($freeKB.'KB', $freePercent.'%'), false, true, 0); |
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| 86 | |||
| 87 | $m = (new VNagValueUomPair($freeKB.'KB')); |
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| 88 | $m->roundTo = ROUND_TO; |
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| 89 | $freeKB = $m->normalize(OUTPUT_UOM); |
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| 90 | |||
| 91 | $m = (new VNagValueUomPair($totalKB.'KB')); |
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| 92 | $m->roundTo = ROUND_TO; |
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| 93 | $totalKB = $m->normalize(OUTPUT_UOM); |
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| 94 | |||
| 95 | $msg = "$freeKB free of $totalKB (".round($freePercent,ROUND_TO)."% free)"; |
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| 96 | $this->setHeadline($msg); |
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| 97 | } |
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| 98 | } |